AOA water treatment biochemical process

Abstract

The invention discloses an AOA water treatment biochemical process, and relates to the technical field of AOA water treatment. The method comprises the following steps: S1, sewage firstly enters an anoxic zone which is generally an environment without enough oxygen and can be realized by controlling oxygen supply, and denitrifying microorganisms utilize nitrate as an oxidizing agent to reduce the nitrate into nitrogen (N2); s2, the treated water flows into an aerobic zone, sufficient oxygen is provided, and in the aerobic environment, organic matter is decomposed into small molecules such as carbon dioxide and water through the biodegradation process. The denitrification process is continued under the anoxic condition, so that nitrate is completely reduced into nitrogen. Through the steps, the system can remove nitrogen substances in the water more thoroughly, and the environmental quality of the water body is ensured. The anoxic zone and the aerobic zone in the whole AOA water treatment biochemical process are alternately carried out, and finally, the organic matters and nitrogen are effectively removed.

Description

Technical Field

[0001] The present invention belongs to the technical field of AOA water treatment, and particularly relates to an AOA water treatment biochemical process. Background Art

[0002] The A2O process is a commonly used secondary sewage treatment process with the function of simultaneous nitrogen and phosphorus removal. Sewage and returned sludge first enter the anaerobic tank and are completely mixed. After anaerobic decomposition for a certain period of time (1 - 2h), part of the BOD is removed, and part of the nitrogen-containing compounds are converted into N2 (denitrification) and released. The polyphosphorus microorganisms (such as polyphosphate-accumulating bacteria) in the returned sludge release phosphorus to meet the phosphorus demand of bacteria. Then the sewage flows into the anoxic tank (DO <= 0.5mg / L). The denitrifying bacteria in the tank use the undegraded carbon-containing organic matter in the sewage as a carbon source to reduce the nitrate returned through the internal circulation from the aerobic tank to N2 and release it.

[0003] The process developed in 1932 was the earliest nitrogen removal process (see the figure), and the process was set up following the sequence of nitrification and denitrification. Since the denitrification process requires a carbon source, and this post-denitrification process uses the endogenous metabolic substances of microorganisms as a carbon source, the energy release rate is very low, so the nitrogen removal rate is also very low. In addition, aerobic reaction occurs at the first stage when sewage enters the system, resulting in too high energy consumption; if the nitrogen content of the raw sewage is relatively high, it will cause the volume of the aerobic tank to be too large, so that the conditions for nitrification cannot be actually met, especially when the temperature is below 15°C; in the anoxic section, due to the release of organic nitrogen and ammonia from the death of microorganisms, some of them flow out with the water, thus reducing the total nitrogen removal in the system. Therefore, this process is not practical in engineering, but it has laid the foundation for the development of subsequent phosphorus and nitrogen removal processes. In the prior art, it is difficult to effectively remove organic matter and nitrogen during the treatment process of the A2O process, resulting in poor water quality, which needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide an AOA water treatment biochemical process, which ensures the complete reduction of nitrate to nitrogen gas by continuing the denitrification process under anoxic conditions. Through this step, the system can more thoroughly remove nitrogen substances in water and ensure the environmental quality of the water body. The anoxic zone and aerobic zone in the entire AOA water treatment biochemical process alternate, and finally effectively remove organic matter and nitrogen, solving the existing problems.

[0005] To solve the above technical problems, the present invention is realized through the following technical solutions:

[0006] The present invention is an AOA water treatment biochemical process, including the following steps:

[0007] S1: The sewage first enters the anoxic zone, which is usually an environment lacking sufficient oxygen and can be achieved by controlling the oxygen supply. Here, denitrifying microorganisms use nitrate as an oxidant and reduce it to nitrogen gas (N2).

[0008] S2: The treated water flows into the aerobic zone where sufficient oxygen is provided. In the aerobic environment, organic matter is decomposed into smaller molecules such as carbon dioxide and water through the process of biodegradation.

[0009] S3: The treated water enters the anoxic zone again to ensure the complete reduction of nitrate.

[0010] S4: The treated water flows through a sedimentation tank where microorganisms and other solid particles settle to the bottom.

[0011] S5: The clarifier further removes suspended solids, making the water clearer.

[0012] S6: The treated water may undergo disinfection to kill any remaining pathogens or bacteria.

[0013] Furthermore, S1 further represents:

[0014] S1.1: Create an environment lacking sufficient oxygen, which is achieved by restricting the oxygen supply. In this zone, nitrogen in the water mainly exists in the form of nitrate (NO3-).

[0015] S1.2: Denitrification process: Under anoxic conditions, denitrifying microorganisms become key participants. These microorganisms use nitrate (NO3-) as an oxidant and reduce it to nitrogen gas (N2). This process can be represented by the following reaction: [NO_3^-\rightarrow\frac{1}{2}N_2+\frac{3}{2}O_2] This means that nitrate is reduced to nitrogen gas and oxygen in the anoxic environment. The main purpose of the denitrification process is to reduce the nitrogen content in the water. High nitrogen content may cause water pollution and, in some cases, environmental problems such as eutrophication. By reducing nitrate to nitrogen gas, this pollution can be effectively reduced.

[0016] S1.3: The released nitrogen gas escapes from the water body in gaseous form, thus removing nitrogen from the water. Nitrogen is one of the main components of air, so its release will not cause negative impacts on the environment.

[0017] Furthermore, S2 is further represented as:

[0018] S2.1: Create an environment with sufficient oxygen, providing suitable environmental conditions for the biodegradation of organic matter.

[0019] S2.2: In an aerobic environment, various aerobic microorganisms begin to participate in biodegradation. These microorganisms use oxygen as an oxidant to decompose organic matter into simpler compounds. This process mainly involves the oxidation reaction of organic matter, in which the carbon chain is gradually broken, producing carbon dioxide (CO2) and water (H2O). A simplified example of organic matter degradation can be expressed as: [C_6H_{12}O_6 + 6O_2 → 6CO_2 + 6H_2O]. This reaction shows that glucose (organic matter) is oxidized to carbon dioxide and water under aerobic conditions. As a result, the organic matter is completely oxidized to carbon dioxide and water. These smaller molecules are relatively stable and have less impact on the environment. The process of biodegradating organic matter is to remove the organic matter from the water to prevent them from accumulating in the water body and causing problems such as eutrophication.

[0020] Furthermore, the said S3 is further expressed as:

[0021] S3.1: Enter the anoxic zone again. The treated water is guided back to the anoxic zone, which is an environment lacking sufficient oxygen. This can be achieved by controlling the oxygen supply or providing other oxygen-consuming conditions;

[0022] S3.2: Reduction of nitrates. In the anoxic environment, the previously incompletely reduced nitrates will continue to be reduced by microorganisms. This process is a continuation of denitrification, in which nitrates are reduced to nitrogen gas (N2). This helps to ensure the complete removal of nitrogen in the water;

[0023] S3.3: Secondary denitrification process. Denitrifying microorganisms play a key role again, using nitrates as an oxidant and reducing them to nitrogen gas. This is a crucial step because it helps to further reduce the nitrate content in the water body;

[0024] S3.4: Release of nitrogen gas. Similar to the previous steps in the anoxic zone, the released nitrogen gas escapes from the water body in gaseous form and is finally removed from the water.

[0025] Furthermore, the said S4 is further expressed as:

[0026] S4.1: Enter the sedimentation tank. The treated water enters the sedimentation tank through a guiding system, which is a device designed to promote the sedimentation of particles;

[0027] S4.2: Sedimentation process. In the sedimentation tank, the flow rate of the water slows down, allowing the microorganisms and other solid particles suspended in the water to have enough time to settle to the bottom. This process is based on gravity, and the particles with greater density settle faster;

[0028] S4.3: Formation of a sediment layer. Over time, a layer of solid sediment will form at the bottom of the sedimentation tank, including microbial residues, suspended particles, etc. This sediment layer is usually referred to as sludge or silt;

[0029] S4.4: Clear water layer. In the sedimentation tank, a relatively clear water layer forms at the upper part. This is because the microorganisms and particles suspended in the water have successfully settled to the bottom;

[0030] S4.5: Removal of suspended matter. Through the sedimentation process, the microorganisms and other suspended particles in the sludge or silt are effectively removed from the water, which helps to improve the clarity of the water;

[0031] S4.6: Sediment treatment. The sediment formed in the sedimentation tank usually needs to be cleaned or treated regularly, which can be achieved through a sludge treatment system, including sludge reflux at the bottom of the sedimentation tank or regular sludge cleaning operations.

[0032] Further, the S5 is further represented as:

[0033] S5.1: Enter the clarifier. The treated water enters the clarifier through a guiding system, which is a device specifically designed for the removal of suspended matter;

[0034] S5.2: Sedimentation occurs again. In the clarifier, the flow rate of the water slows down again, allowing any tiny suspended matter that has not been sedimented to have the opportunity to settle to the bottom of the water body, which further improves the clarity of the water;

[0035] S5.3: Use sedimentation plates or pipes. The clarifier is usually designed with sedimentation plates, pipes or other devices for sedimentation. These structures help to guide the tiny suspended matter in the water to form larger clusters in the water, making it easier to settle. These devices help to improve the clarification effect;

[0036] S5.4: Removal of turbidity. One of the main objectives of the clarifier is to reduce the turbidity of the water. By removing tiny suspended particles, the water becomes more transparent and clear.

[0037] Further, the S6 is further represented as:

[0038] S6.1: Select a disinfectant. In disinfection treatment, common disinfectants include chlorine, ozone, ultraviolet radiation, etc. The selection of a disinfectant is usually based on factors such as its effectiveness against microorganisms, cost, and environmental friendliness;

[0039] S6.2: Chlorine disinfection. If chlorine is selected as the disinfectant, its function is to oxidize and destroy the cell structure of microorganisms, thereby killing pathogens and bacteria. The dosage of chlorine should be accurately calculated to ensure the bactericidal effect without producing by-products;

[0040] S6.3: Odor disinfection. Odor is another disinfectant. It releases active oxygen in water and has the functions of oxidation and sterilization. This method is relatively non-toxic and will not leave chlorine residues in water.

[0041] S6.4: Ultraviolet radiation. Ultraviolet radiation is a method of killing microorganisms by irradiating water bodies with ultraviolet lamps. It destroys the genetic material of microorganisms and prevents their reproduction and growth.

[0042] S6.5: Regular monitoring and adjustment. The disinfection process requires regular monitoring of water quality to ensure appropriate dosing of disinfectants.

[0043] S6.6: Treatment of disinfectant residues. After disinfection treatment, it is also necessary to consider methods for treating disinfectant residues to prevent adverse effects on water quality.

[0044] Furthermore, the above-mentioned S7 is further represented as:

[0045] S7.1: Select an appropriate water filter. Select an appropriate type and specification of water filter to meet water quality requirements. Common water filters include sand filters, activated carbon filters, microfiltration membranes, etc. The selection depends on the required filtration level and water quality standards.

[0046] S7.2: Pretreatment. Before entering the water filter, some pretreatment steps can be carried out, such as adding drugs or purifying agents, to further remove residual organic matter or microorganisms.

[0047] S7.3: Filtration of suspended solids and microorganisms. The main function of the water filter is to filter out fine particles, suspended solids and microorganisms in water. This helps to improve the clarity of water and prevent impurities from entering the final water supply.

[0048] S7.4: Monitor water quality. Regularly monitor the water quality of the treated water, including measuring the concentration of suspended solids and the presence of microorganisms, to ensure the normal operation of the water filter.

[0049] S7.5: Final water supply. The water treated by the water filter is finally supplied to the user end. Such water quality is purer, free of suspended solids, microorganisms and other impurities.

[0050] The present invention has the following beneficial effects:

[0051] 1. By continuing the denitrification process under anoxic conditions, the present invention ensures the complete reduction of nitrates to nitrogen gas. Through this step, the system can more thoroughly remove nitrogen substances in water and ensure the environmental quality of the water body. The anoxic zone and aerobic zone in the entire AOA water treatment biochemical process alternate, ultimately achieving effective removal of organic matter and nitrogen.

[0052] 2. By slowing down the water flow rate and utilizing gravity, the present invention enables microorganisms and other solid particles to settle to the bottom of the sedimentation tank, thereby effectively removing these suspended substances. This helps improve the water quality, reduce the environmental impact of suspended matter, and is a crucial step in ensuring the final water supply meets hygienic standards in conjunction with disinfection treatment. By selecting appropriate disinfectants and controlling the dosage, residual pathogens and bacteria can be effectively killed to ensure the safety of the water.

[0053] Of course, it is not necessary for any product implementing the present invention to simultaneously achieve all the above-mentioned advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0055] Figure 1 It is a schematic flow chart of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, rather than all, embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0057] Please refer to Figure 1 , the present invention is an AOA water treatment biochemical process, including the following steps:

[0058] S1: The sewage first enters the anoxic zone, which is usually an environment without sufficient oxygen and can be achieved by controlling the oxygen supply. Here, denitrifying microorganisms use nitrate as an oxidant and reduce it to nitrogen gas (N2);

[0059] S2: The treated water flows into the aerobic zone, where sufficient oxygen is provided. In the aerobic environment, organic matter is decomposed into smaller molecules, such as carbon dioxide and water, through the process of biodegradation;

[0060] S3: The treated water enters the anoxic zone again to ensure the complete reduction of nitrate;

[0061] S4: The treated water flows through a sedimentation tank, where microorganisms and other solid particles settle to the bottom;

[0062] S5: The clarifier further removes suspended solids, making the water clearer.

[0063] S6: The treated water may undergo disinfection to kill any remaining pathogens or bacteria.

[0064] S1 further states:

[0065] S1.1: Create an environment lacking sufficient oxygen, achieved by restricting the oxygen supply. In this area, nitrogen in the water mainly exists in the form of nitrate (NO3-).

[0066] S1.2: Denitrification process: Under anoxic conditions, denitrifying microorganisms become key participants. These microorganisms use nitrate (NO3-) as an oxidant and reduce it to nitrogen gas (N2). This process can be represented by the following reaction: [NO_3^-\rightarrow\frac{1}{2}N_2+\frac{3}{2}O_2] This means that nitrate is reduced to nitrogen and oxygen in an anoxic environment. The main purpose of the denitrification process is to reduce the nitrogen content in the water. High nitrogen content may cause water pollution and, in some cases, environmental problems such as eutrophication. By reducing nitrate to nitrogen gas, this pollution can be effectively reduced.

[0067] S1.3: The released nitrogen gas escapes from the water body in gaseous form, thus removing nitrogen from the water. Nitrogen is one of the main components of air, so its release does not have a negative impact on the environment.

[0068] S2 is further described as:

[0069] S2.1: Create an environment that provides sufficient oxygen, providing suitable environmental conditions for the biodegradation of organic matter.

[0070] S2.2: In an aerobic environment, various aerobic microorganisms start to participate in biodegradation. These microorganisms use oxygen as an oxidant and decompose organic matter into simpler compounds. This process mainly involves the oxidation reaction of organic matter, where the carbon chain is gradually broken, producing carbon dioxide (CO2) and water (H2O). A simplified example of organic matter degradation can be represented as: [C_6H_{12}O_6+6O_2\rightarrow 6CO_2+6H_2O] This reaction shows that glucose (organic matter) is oxidized to carbon dioxide and water under aerobic conditions. As a result, the organic matter is completely oxidized to carbon dioxide and water. These smaller molecules are relatively stable and have less impact on the environment. The process of biodegradating organic matter is to remove organic matter from the water to prevent them from accumulating in the water body and causing problems such as eutrophication.

[0071] S3 is further described as:

[0072] S3.1: Re-enter the anoxic zone. The treated water is guided back to the anoxic zone, which is an environment lacking sufficient oxygen. This can be achieved by controlling the oxygen supply or providing other oxygen-consuming conditions;

[0073] S3.2: Reduction of nitrates. In the anoxic environment, the previously incompletely reduced nitrates will continue to be reduced by microorganisms. This process is a continuation of denitrification, in which nitrates are reduced to nitrogen gas (N2). This helps to ensure the complete removal of nitrogen from the water;

[0074] S3.3: Secondary denitrification process. Denitrifying microorganisms play a key role again, using nitrates as oxidants and reducing them to nitrogen gas. This is a crucial step as it helps to further reduce the nitrate content in the water body;

[0075] S3.4: Release of nitrogen gas. Similar to the previous steps in the anoxic zone, the released nitrogen gas escapes from the water body in gaseous form and is finally removed from the water.

[0076] S4 is further represented as:

[0077] S4.1: Enter the sedimentation tank. The treated water enters the sedimentation tank through a guiding system, which is a device designed to promote the sedimentation of particles;

[0078] S4.2: Sedimentation process. In the sedimentation tank, the flow rate of the water slows down, allowing the microorganisms and other solid particles suspended in the water to have sufficient time to settle to the bottom. This process is based on gravity, and the particles with a larger density settle faster;

[0079] S4.3: Formation of a sediment layer. Over time, a layer of solid sediment will form at the bottom of the sedimentation tank, including microbial residues, suspended particles, etc. This sediment layer is usually referred to as sludge or silt;

[0080] S4.4: Clear water layer. In the sedimentation tank, a relatively clear water layer forms at the upper part. This is because the microorganisms and particles suspended in the water have successfully settled to the bottom;

[0081] S4.5: Removal of suspended substances. Through the sedimentation process, the microorganisms and other suspended particles in the sludge or silt are effectively removed from the water, which helps to improve the clarity of the water;

[0082] S4.6: Treatment of sediment. The sediment formed in the sedimentation tank usually needs to be cleaned or treated regularly, which can be achieved through a sludge treatment system, including sludge reflux at the bottom of the sedimentation tank or regular sludge cleaning operations.

[0083] S5 is further represented as:

[0084] S5.1: Enter the clarifier. The treated water enters the clarifier through a guiding system. This is a device specifically designed for the removal of suspended solids.

[0085] S5.2: Sedimentation occurs again. In the clarifier, the flow rate of the water slows down again, allowing any tiny suspended solids that have not been sedimented to have the opportunity to settle to the bottom of the water body, which further improves the clarity of the water.

[0086] S5.3: Use sedimentation plates or pipes. The clarifier is usually designed with sedimentation plates, pipes or other devices for sedimentation. These structures help to guide the tiny suspended solids in the water to form larger clusters, making it easier to settle. These devices help to improve the clarification effect.

[0087] S5.4: Remove turbidity. One of the main objectives of the clarifier is to reduce the turbidity of the water. By removing tiny suspended particles, the water becomes more transparent and clear.

[0088] S6 is further represented as:

[0089] S6.1: Select a disinfectant. In disinfection treatment, common disinfectants include chlorine, ozone, ultraviolet radiation, etc. The selection of a disinfectant is usually based on factors such as its effectiveness against microorganisms, cost, and environmental friendliness.

[0090] S6.2: Chlorine disinfection. If chlorine is selected as the disinfectant, its role is to oxidize and destroy the cell structure of microorganisms, thereby killing pathogens and bacteria. The dosage of chlorine should be accurately calculated to ensure the bactericidal effect without producing by-products.

[0091] S6.3: Ozone disinfection. Ozone is another disinfectant. It releases active oxygen in water, which has the effect of oxidation and sterilization. This method is relatively non-toxic and does not leave chlorine residues in the water.

[0092] S6.4: Ultraviolet radiation. Ultraviolet radiation is a method of killing microorganisms by irradiating the water body with ultraviolet lamps. It destroys the genetic material of microorganisms and prevents their reproduction and growth.

[0093] S6.5: Regular monitoring and adjustment. The disinfection process requires regular monitoring of the water quality to ensure the appropriate dosage of the disinfectant.

[0094] S6.6: Treatment of disinfectant residues. After disinfection treatment, it is also necessary to consider methods for treating disinfectant residues to prevent them from having an adverse impact on water quality.

[0095] S7 is further represented as:

[0096] S7.1: Select an appropriate water filter. Select a water filter of an appropriate type and specification to meet the water quality requirements. Common water filters include sand filters, activated carbon filters, microfiltration membranes, etc., and their selection depends on the required filtration level and water quality standards;

[0097] S7.2: Pretreatment. Before entering the water filter, some pretreatment steps can be carried out, such as adding drugs or purifying agents, to further remove residual organic matter or microorganisms;

[0098] S7.3: Suspended solid and microorganism filtration. The main function of the water filter is to filter out tiny particles, suspended solids and microorganisms in the water. This helps to improve the clarity of the water and prevent impurities from entering the final water supply;

[0099] S7.4: Monitor water quality. Regularly monitor the water quality of the treated water, including measuring the concentration of suspended solids and the presence of microorganisms, to ensure the normal operation of the water filter;

[0100] S7.5: Final water supply. The water treated by the water filter is finally supplied to the user end. Such water quality is purer, free of suspended solids, microorganisms and other impurities.

[0101] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0102] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An AOA water treatment biochemical process, characterized in that: It includes the following steps: S1: The sewage first enters the anoxic zone, which is usually an environment without sufficient oxygen and can be achieved by controlling the oxygen supply. Here, denitrifying microorganisms use nitrate as an oxidant and reduce it to nitrogen gas (N2). S2: The treated water flows into the aerobic zone, where sufficient oxygen is provided. In the aerobic environment, organic matter is decomposed into smaller molecules, such as carbon dioxide and water, through the process of biodegradation. S3: The treated water enters the anoxic zone again to ensure the complete reduction of nitrate. S4: The treated water flows through a sedimentation tank, where microorganisms and other solid particles settle to the bottom. S5: The clarifier further removes suspended solids, making the water clearer. S6: The treated water may undergo disinfection to kill any remaining pathogens or bacteria. S7: Finally, a water filter is used to filter out debris from the treated water.

2. The AOA water treatment biochemical process according to claim 1, characterized in that, S1 further indicates: S1.1: Create an environment lacking sufficient oxygen, which is achieved by restricting the oxygen supply. In this area, nitrogen in the water mainly exists in the form of nitrate (NO3-). S1.2: The denitrification process. S1.3: The released nitrogen gas escapes from the water body in gaseous form, thus removing nitrogen from the water.

3. The AOA water treatment biochemical process according to claim 2, wherein, S2 is further represented as: S2.1: Create an environment with sufficient oxygen, providing suitable environmental conditions for the biodegradation of organic matter. S2.2: In the aerobic environment, various aerobic microorganisms start to participate in biodegradation. These microorganisms use oxygen as an oxidant and decompose organic matter into simpler compounds.

4. The AOA water treatment biochemical process according to claim 3, characterized in that, S3 is further represented as: S3.1: Enter the anoxic zone again. S3.2: The reduction of nitrate. S3.3: The secondary denitrification process. S3.4: The release of nitrogen gas.

5. The AOA water treatment biochemical process according to claim 4, characterized in that, S4 is further represented as: S4.1: Enter the sedimentation tank, and the treated water enters the sedimentation tank through a guiding system. S4.2: The sedimentation process. In the sedimentation tank, the flow rate of the water slows down, allowing suspended microorganisms and other solid particles in the water enough time to settle to the bottom. S4.3: A sediment layer is formed. Over time, a layer of solid sediment will form at the bottom of the sedimentation tank, including microbial residues, suspended particles, etc. S4.4: The clear water layer. In the sedimentation tank, a relatively clear water layer forms at the upper part. This is because the suspended microorganisms and particles in the water have successfully settled to the bottom. S4.5: Removal of suspended solids. Through the sedimentation process, microorganisms and other suspended particles in the sludge or silt are effectively removed from the water. S4.6: Sediment treatment. The sediment formed in the sedimentation tank usually needs to be cleaned or treated regularly.

6. The AOA water treatment biochemical process according to claim 5, wherein, S5 is further represented as: S5.1: Enter the clarifier, and the treated water enters the clarifier through a guiding system. S5.2: Sedimentation occurs again. In the clarifier, the flow rate of the water slows down again, allowing any tiny suspended solids that have not been sedimented to settle to the bottom of the water body. S5.3: Use sedimentation plates or pipes. The clarifier is usually designed with sedimentation plates, pipes, or other devices for sedimentation. S5.4: Removal of turbidity.

7. The AOA water treatment biochemical process according to claim 6, wherein, S6 is further represented as: S6.1: Select a disinfectant S6.2: Chlorine disinfection; S6.3: Odor disinfection; S6.4: Ultraviolet radiation; S6.5: Regular monitoring and adjustment; S6.6: Disinfectant residue treatment.

8. The AOA water treatment biochemical process according to claim 7, characterized in that, The said S7 is further expressed as: S7.1: Select an appropriate water filter; S7.2: Pretreatment; S7.3: Suspended solid and microorganism filtration; S7.4: Monitor water quality; S7.5: Final water supply.

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